The union was established in January 1954, with the merger of two smaller unions of local government workers. It affiliated to the General Council of Trade Unions of Japan and grew rapidly, having 559,397 members by 1967. By 1987, it was the largest union in the country, with 1,257,000 members. Three years later, it affiliated to the Japanese Trade Union Confederation.
The union absorbed the National Union of General Workers in 2006, and the All Japan Municipal Transport Workers’ Union in 2013. Despite this, by 2020, its membership had declined to 785,445, and it was Japan’s second-largest union.
- Asian Survey (1990)
- Chaffee, Frederick H. (1969). Area Handbook for Japan. Washington DC: U.S. Government Printing Office.
- Foreign Labor Trends: Japan. Washington DC: United States Department of Labor. 1988.
- “Jichiro”(PDF). JICHIRO. Retrieved 8 December 2021.
- “RENGO 2020-2021”(PDF). RENGO. Retrieved 18 November 2021.